Crucible for lead-furnaces



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N. R. WILSON. GRUGIBLBPOR LEAD FURNAGES.

Patented Nov. 26, 1889.

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N, R. WILSON. GRUGIBLB'foR LEAD PURNAGBVS.

10.416,085. Patented Nov. 26,1839.

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N. R. WIL-SON. CRUIBLE POR LEAD PURNACES.

Patented Nov. 2.6, 1889A..

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: myn EVE UNITED STATES PATENT OEEICE.r

NEVTON R. VILSON, OF SOCORRO, TERRITORY OF NEINT MEXICO.

ORUOIBLE FOR LEAD-FURNAOES.

SPECIFICATION forming part of Letters Patent No. 416,085, dated November 26, 1889.

Application tiled January 19, 1888. Serial No. 261,315. (No model.)

To aZZ whom t may concern:

Be it known that I, NEWTON R. WrLsoN, a citizen of the United States, residing at Socorro, county of Socorro, and Territory ofNew Mexico, have invented certain new and useful Improvements in Crucibles for Lead-Furnaces, of which the following is a specification.

The invention relates to a detached crucible to be used in lead-smelting for the separation of lead or bullion from matte, speiss, and slag, and has for its object the overcoming of the diiiculties which are common in Crucible furnaces-frequent solidification of the molten matter in the bottom of the furnace.

The invention will be first fully described with reference to the accompanying drawings, and then be specifically pointed out in the claims.

In said drawings, Figure l is a plan view of the body of my improved crucible. Fig. 2 is a vertical axial section thereof in position for discharging into the bullion-molds. Fig. 3 is an end View showing the crucible in position for tilting. Fig. 4 is a perspective view showing the protecting-screen and the removable partition, the latter raised.

The crucible consists of a cast-iron box or bowl l, preferably made with its sides tapering toward the bottom and in sections bolted together or in one piece, as desired. It is divided unequally into two compartments by a movable partition 2, which is complementary in shape to the cross-section of the bowl and rests against the flanges 3, and has lugs 4 sliding` over said flanges and holding it thereto. The large compartmentl designate the slag-compartment,77 and the small one the lead-compartment. The partition projects slightly above the top of the bowl and has a hole in it near the top for the insertion of a bar employed to raise and lower the partition. Vhen raised, the partition may also be supported by passing a chain 2 through this hole.

The bowl l has a non-conducting jacket, consisting of a sheet-iron casing 5, fixed to the bowl by bolts 6, and containing any suitable non-conducting material 7, such as mineral wool. If desired, a cover similarly made to thisjacket maybe employed for the slag-compartment part of the bowl to retain the heat still more etfectually. The spout 8 at the top of the large compartment is for` the overflow of slag. Similar spout 9, a little lower down, is for the discharge of matte and speiss, while the spout l0, having opening 1l formed in a cast-iron projection from the bottom of the lead-compartment side of the bowl, is for the discharge of lead.

l2 are a number of bullion-molds set upon a truck, which may consist of track-wheels 13, cross -bars 14, tie-bars l5, and sills 16. The latter may be made of ordinary railroadiron, as shown in Fig. 3. Cast upon each end of the bowl 1 are arms 17, bored to receive trunnions 18, shrunk therein. Upon these trunnions the bowl tilts, resting on a frame 19, carried by a truck 20. On the base of the bowl is secured a ring 2l, to which may be connected a hook 22 on chain 23, which is brought into operation by block and tackle 24, suspended from a suitable derrick 25.

Hanging over the crucible and extending down upon the side away from the furnace between the lead and slag compartments is a screen 26, made by riveting two pieces of sheet-iron to a light iron frame, leaving airspace between. The movable partition being luted with clay and lowered into position, and the hole at the bottom of the leadcompartment and the tap-hole for matte 9 being stopped with plugs of clay, the crucible is run up in front of the smelting-furnace so that the spout from the furnace projects over into the slag-compartment at the point C. The furnace is now tapped and the lead or base bullion, matte, speiss, and. slag are all allowed to how into the slag-compartment of the crucible.

The different substances arrange themselves in the Crucible according to their spe- IOO partment, the partition not being raised suficiently to allow any matte, speiss, or slag .t0 flow into the lead-compartment.

As the lead accumulates in the crucible it may be dipped from the lead-compartment or tapped through the hole 11 into the molds on the movable rack below. At intervals matte and speiss are tapped through the hole 9, or the partition is raised sufficiently to allow them to ow into the lead-compartment, where they quickly solidify on the top of the lead and may be removed in cakes.

The screen 26, Fig. 4, is hung in position to protect the workmen from the heat and smoke when dipping or tapping lead.

The constant flow of molten material into the crucible and the fact that it is surrounded by a non-conducting substance keeps its contents Huid for a long` time. Gradually, however, it solidiiies aroundv the sides and top, and it becomes necessary to remove it from the furnace and substitute another. All the lead in the crucible is now allowed to flow through the hole 11 into the bullion-molds. The crucible is then pushed away from the furnace and run under a derrick, Fig. 3, on which is hung a pulley. The movable partition is now lifted out of the crucible, leaving a small space between the chilled contents and the ange 3. A chain is now attached to the ring at the bottom of the crucible and to the pulley, Fig. 3, when the bowl of the crucible is inverted and its contents allowed to drop into a pit below. y

An apparatus similar to this is also shown and described in my applications, Serial No. 282,722, filed August 4, 1888, and Serial No. 285,625, filed September 17, 1888.

Having thus described my invention, the following` is what I claim as new therein and desire to secure by Letters Patent:

1. A crucible-bowl provided with a movable partition extending to the bottom of said crucible, for the purpose set forth, and flanges adapted to overlap the edges of said partition, substantially as and for the purposes set forth.

2. The combination, with the crucible-bowl, of flanges within said bowl, a partition adapted to rest against said ilanges, and lugs for locking said partition to the `flanges, substantially as set forth.

3. The combinatiomwith the crucible-bowl having tapering sides, of anges fitted within said crucible and extending upward from the bottom thereof and a removable partition resting on the bottom of the crucible and overlapping and resting against said flanges, substantially as set forth.

NEWTON R. WILSON. lVitnesses:

GEO. J. WAULEss, E. D. RUST. 

